... ,coal tar constituents, will not pollute the environment.Technical Capacity IndexThe product meets the requirements of GB19250-2003 Polyurethane Waterproof ... wall of basement.3, Tunnels,subway,roads and bridges waterproof engineering.4, Channel, swimming pool, sewage tank, urban ... for expired storage4,Product packing: Single unit polyurethane waterproof coating is sealed in an iron barrel.5,Package ...